package gdou.gym.sys.result;

import gdou.gym.exception.StateCode;
import gdou.gym.returnvo.ResultVo;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@ControllerAdvice(annotations = RestController.class)
public class ReturnResultVo implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return !returnType.getParameterType().isAssignableFrom(String.class);
    }

    @Override
    @ResponseBody
    public ResultVo beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body == null) {
            return new ResultVo(StateCode.SUCCESS);
        }
        return new ResultVo(body);
    }
}
